Hello there, we just updated oVirt engine to 4.5.3.2-1.el8 which was smooth, but then when we start to update all nodes, after restart mom-vdsm service is failing to start mom-vdsm rpm -q vdsm vdsm-4.50.3.4-1.el8.x86_64 (VDSM was updated from 4.50.2.2-1.el8 ) rpm -q mom mom-0.6.3-1.el8.noarch (MOM was not updated duting tha last update) here is error from /var/log/vdsm/mom.log 2022-10-28 13:17:18,105 - mom - INFO - MOM starting 2022-10-28 13:17:18,138 - mom.HostMonitor - INFO - Host Monitor starting 2022-10-28 13:17:18,138 - mom - INFO - hypervisor interface vdsmjsonrpcclient 2022-10-28 13:17:18,179 - mom.HostMonitor - INFO - HostMonitor is ready 2022-10-28 13:17:18,242 - mom.GuestManager - INFO - Guest Manager starting: multi-thread 2022-10-28 13:17:18,247 - mom.Policy - INFO - Loaded policy '00-defines' 2022-10-28 13:17:18,247 - mom - ERROR - Failed to initialize MOM threads Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/mom/__init__.py", line 35, in run host_monitor, guest_manager) File "/usr/lib/python3.6/site-packages/mom/PolicyEngine.py", line 42, in __init__ self.load_policy() File "/usr/lib/python3.6/site-packages/mom/PolicyEngine.py", line 71, in load_policy read_policy(fname, name.split('.policy')[0]) File "/usr/lib/python3.6/site-packages/mom/PolicyEngine.py", line 53, in read_policy return self.policy.set_policy(policy_name, policyStr) File "/usr/lib/python3.6/site-packages/mom/Policy/Policy.py", line 64, in set_policy self.code = get_code(Evaluator(), self._cat_policies()) File "/usr/lib/python3.6/site-packages/mom/Policy/Parser.py", line 543, in get_code tokens = scanner.tokenize(string) File "/usr/lib/python3.6/site-packages/mom/Policy/Parser.py", line 72, in tokenize GenericScanner.tokenize(self, input) File "/usr/lib/python3.6/site-packages/mom/Policy/spark.py", line 78, in tokenize add_lines = self.index2func[i](groups[i], line) TypeError: t_default() takes 2 positional arguments but 3 were given any tip what could be the reason ? Thaak you Jirka